import router from './routers';
import store from '@/store';
import NProgress from 'nprogress'; // progress bar 进度条
import 'nprogress/nprogress.css';// progress bar style 进度条样式
import { getToken } from '@/utils/auth'; // getToken from cookie
import { buildMenus } from '@/api/system/menu';
import { filterAsyncRouter } from '@/store/modules/permission';
import Config from '@/settings';

NProgress.configure({ showSpinner: false });// NProgress Configuration

const whiteList = ['/login', '/s/index', '/s/entity', '/s/more', '/s/guest', '/s/login', '/uc/mobile', '/s/download'];// no redirect whitelist

router.beforeEach((to, from, next) => {
  if (undefined === store.getters.config.id) {
    store.dispatch('settings/setConfig').then(res => {
      console.log('加载配置文件成功！');
    });
  }
  if (to.meta.title) {
    // 设置title属性
    document.title = to.meta.title + ' - ' + store.getters.config.title;
  }
  NProgress.start();// 开启进度条
  if (getToken()) {
    // 已登录且要跳转的页面是登录页
    if (to.path === '/login') {
      next({ path: '/' });
      NProgress.done();// 关闭进度条
    } else {
      if (store.getters.roles.length === 0) { // 判断当前用户是否已拉取完user_info信息
        store.dispatch('GetInfo').then(res => { // 拉取user_info
          // 动态路由，拉取菜单
          loadMenus(next, to);
        }).catch((err) => {
          console.log(err);
          store.dispatch('LogOut').then(() => {
            location.reload(); // 为了重新实例化vue-router对象 避免bug
          });
        });
      // 登录时未拉取 菜单，在此处拉取
      } else if (store.getters.loadMenus) {
        // 修改成false，防止死循环
        store.dispatch('updateLoadMenus').then(res => {});
        loadMenus(next, to);
      } else {
        next();
      }
    }
  } else {
    /* has no token*/
    if (whiteList.indexOf(to.path) !== -1) { // 在免登录白名单，直接进入
      next();
    } else if (Config.isGuest) { // 是否支持游客模式
      next(`/s/index`);
    } else if ('/s/service'.indexOf(to.path) !== -1) {
      next();
    } else if (Config.isCas) { // 开启身份认证
      window.location.replace(`/cas?redirect=${to.fullPath}`);
    } else {
      next(`/login?redirect=${to.fullPath}`); // 否则全部重定向到登录页
      NProgress.done();
    }
  }
});

export const loadMenus = (next, to) => {
  buildMenus().then(res => {
    const asyncRouter = filterAsyncRouter(res);
    asyncRouter.push({ path: '*', redirect: '/404', hidden: true });
    store.dispatch('GenerateRoutes', asyncRouter).then(() => { // 存储路由
      router.addRoutes(asyncRouter); // 动态添加可访问路由表
      next({ ...to, replace: true });
    });
  });
};

router.afterEach(() => {
  NProgress.done(); // finish progress bar
});
